package com.sky.service.impl;

import com.sky.dto.ShoppingCartDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.ShoppingCart;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.mapper.ShoppingCartMapper;
import com.sky.service.ShoppingCartService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.List;


@Service
public class ShoppingCartServicelmpl implements ShoppingCartService {
    @Autowired
    private ShoppingCartMapper shoppingCartMapper;
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private SetmealMapper setmealMapper;
    @Autowired
    private UserServicelmpl userServicelmpl;

    public void add(ShoppingCartDTO shoppingCartDTO) {
        //获得购物车
        ShoppingCart shoppingCart=new ShoppingCart();
        BeanUtils.copyProperties(shoppingCartDTO,shoppingCart);
        //TODO userid获取不到，传入为null 先用openid暂时作为唯一标识
       // Long userId= BaseContext.getCurrentId();
        shoppingCart.setUserId(userServicelmpl.getOpenid());

        List<ShoppingCart> list=shoppingCartMapper.list(shoppingCart);
        
        //判断购物车是否为空
        if(list!=null && list.size()>0){
            ShoppingCart cart=list.get(0);
            cart.setNumber(cart.getNumber()+1);
            shoppingCartMapper.updateNumberById(cart);
        }else{
            Long dishId=shoppingCartDTO.getDishId();
            if(dishId!=null){
                Dish dish=dishMapper.findDish(dishId);
                shoppingCart.setName(dish.getName());
                shoppingCart.setImage(dish.getImage());
                shoppingCart.setAmount(dish.getPrice());
            }else{
                Long steamId=shoppingCartDTO.getSetmealId();
                Setmeal setmeal=setmealMapper.getById(steamId);
                shoppingCart.setName(setmeal.getName());
                shoppingCart.setImage(setmeal.getImage());
                shoppingCart.setAmount(setmeal.getPrice());
            }
            shoppingCart.setNumber(1);
            shoppingCart.setCreateTime(LocalDateTime.now());
            shoppingCartMapper.insert(shoppingCart);
        }

    }

    @Override
    public List<ShoppingCart> showShoppingCart() {
        ShoppingCart shoppingCart=ShoppingCart.builder()
                .userId(userServicelmpl.getOpenid())
                .build();
        return shoppingCartMapper.list(shoppingCart);
    }

    @Override
    public void clean() {
        shoppingCartMapper.clean(userServicelmpl.getOpenid());
    }

    /**
     * 删除购物车中一个商品
     * @param shoppingCartDTO
     */
    public void subShoppingCart(ShoppingCartDTO shoppingCartDTO) {
        ShoppingCart shoppingCart = new ShoppingCart();
        BeanUtils.copyProperties(shoppingCartDTO,shoppingCart);
        //设置查询条件，查询当前登录用户的购物车数据
        shoppingCart.setUserId(userServicelmpl.getOpenid());

        List<ShoppingCart> list = shoppingCartMapper.list(shoppingCart);

        if(list != null && list.size() > 0){
            shoppingCart = list.get(0);

            Integer number = shoppingCart.getNumber();
            if(number == 1){
                //当前商品在购物车中的份数为1，直接删除当前记录
                shoppingCartMapper.deleteById(shoppingCart.getId());
            }else {
                //当前商品在购物车中的份数不为1，修改份数即可
                shoppingCart.setNumber(shoppingCart.getNumber() - 1);
                shoppingCartMapper.updateNumberById(shoppingCart);
            }
        }
    }
}
